An aside: What was the real cause for the electoral upset in MA?

Republican Scott Brown accomplished the impossible on Tuesday: He won a Senate seat in liberal Massachusetts. Democrats say the result is a backlash against incumbents in general. Republicans indicate it's a backlash against Obama and his liberal policies.

So who is correct? I maintain that both parties have it wrong. The election indicates a backlash against Democrats in the Senate who conducted secret meetings, restricted Republican amendments, and reduced debate on health care legislation. The public is frustrated by the lack of transparency in the institution created of, by, and for the people.